Electric-arc cutting apparatus



March 11, 1930. v v. Bl-SOUNlT ZA- 1,750,436

I ELECTRIC ARC CUTTING APPARATUS Original Filed Aug. l? 1927 VLADIMIR B. S0u1wrzA mvsmoa ATTORNEY Patented Mar. 11, 1930 UNITED STATES vmnmm a. sounrrzn, or rssnnnna, csmromzm ELECTRIC-ABC CUTTING A PPABATUS Application filed August 17, 1927, Serial No. 213,533. Benewcd January 23, 1930.

creased, however, by rendering the flame of the are strongly oxidizing. For this purpose I introduce a blast of oxygen in the are 16 in such a manner that it deflects the arc a ainst the .;work and, together with the heat 0% the arc, tends to rapidly oxidize and destroy the material of the work atthe point of application of the arc,

My invention is more fully described in the accompanying specification and drawing ill-which- Fig. 1 is an elevation of my device, and Fig.2 is a topview of same.

My apparatus consists of electrode holders or supportin bars 1 and 2 joined at the rear ends with a at spring 3 which tends to keep them apart. They are. held at a desired distance from each other by means of a screw 4 one end 'ofrwhich is attached to the bar 2 and the other passes freely through an aperture in the bar 1 and is provided with an adjusting wing nut 5. 1

The other ends of bars 1 and 2 support clips 6 and 7 attached with screws 8. These clips are provided with tubular outer portions in which are electrodes 9 and 10 are slidably fitted. Theclips are preferably made of thin resilient metal strips and the electrodes can be clamped tightly by means of screws 11 which are adapted to draw the sides of the clips to ether. Nuts (not shown) may be provide on the ends ofthe screws 11. The cli sare placed at an angle as shown in order to bringthe 0 rating ends of the electrodes 9 and 10 toget er. J

Terminals 12 and 18 are clamped .under screws 8 for cables 14 and 15 which are used 7 to connect'the electrodes with a source of 60 electric current (not shown). The cables are covered with a heat resisting insulation, which may be asbestos, glass beads etc.

The bars 1 and 2 are also made of a heat resisting insulating material, such as bakelite or similar compositions.

The cables are attached to the lower bar 2 by means of a clip 16 and a screw 17. The same clip also holds a pipe 18 for oxygen or similar gas of an oxidizing nature; A flexible rubber hose 19 is connectedwith the pipe 18. a 1

The front end of the pipe 18 is provided with a nozzle 20 made of arefractory material, such as porcelain, lava, etc. This nozzle is slidably fitted on the. end of the .65 pipe-and may be moved at a'desired distance from the are 21. It is placed so that a stream of oxygen can be directed in the middle of the are from the rear.

The operation of my device is as follows: 7 The operator takes the electrode holders in his hand, adjusting the wing nut 5 so as to keep the electrodes at an approximately cor-. rect distance apart. The current is then turned on by means of a suitable switch (not shown), and the wing nut again adjusted for the correct length of arc. The oxygen is then admitted into the pipe 18 from a storage tank or bottle (not shown). The are is drawn by a closing the electrodes and releasing them again. This is accomplished by simply tightening thehand grip on the bars and releasing again. The electrodes are usually 7 made of carbon and, since they are gradually consumed by the arc, the proper length of same can be maintained by tlghtening the screw 5 or, for short periods, by tightening the hand grip on the bar.

Im ortant advantages of my device are that it is portable, only. one hand is required for its operation, and it allows a convenient regulation of the length of the arc. The method of using an arc with a stream of oxygen has an advantage of providing a powerful oxidizing arc flame for cutting metals.

I claim as my invention: 1. In an electric are cutting a combination with electrodes o supporting bars .for said electrodes,'means to keep said bars apart, an adjustable means to limit the extreme distance between said electrodes, means to supply electric current to said electrodes, said bars being adapted to be held in 5 a grip of an operators hand, and being further adapted to be moved together by the pressure from said hand against said separating means, and means to direct a flow of oxygen between operating points of said electrodes. 7 2. In an electric are cutting apparatus, the combination with electrodes, 0 supportingbars for said electrodes, said bars being made 1 of an insulating material, a spring forming a loop and attached with its ends to the rear ends of said supporting bars,'the other ends of said bars being adapted to support said electrodes in an lnclined position with respect to each other, said bars being adapted to be held in a grip oi an operators hand,

means to conduct electric. current to said electrodes so asto produce electric are between operating points of said electrodes, when said electrodes are brought together by the pres- 5 sure from said operators hand and separated again, and means to direct a flow of oxygen against said arc. 3. In an electric are cutting a paratus, the combination with electrodes, 0% supporting means for said electrodes, means'to conduct electric current to said electrodes, means to move said electrodes apart, means to adjustably limit said movement of the electrodes apart, said electrodes being adapted to be manually moved together, and means to direct the'flow of oxygen against the tips of said electrodes.

Signed at New York, in the county of New 22k and State of New York, August, A. D. 40 4 VLADIMIR B. SOUNITZA. 

